Remember when Walmart announced it was going to start taking video-game trade-ins? Well, now the retail giant's ready to sell them back to you. Starting November 3rd, some 1,700 of Walmart's stores will begin selling pre-owned games. And to take another swipe at GameStop, Walmart's also announced that it'll be selling this year's Call of Duty, Advanced Warfare, at 12.01 a.m. on "day zero" without needing to pre-order it. What's more, any trade-ins made on November 3rd and 4th (Advanced Warfare's launch days) will net you 50 percent more credit when you purchase CoD. Need a console to play it on? Well, anything you trade in toward a PlayStation 4 will net you double the in-store credit -- tough luck if you wanted a matching Xbox One.